Abstract:
Infrared non-destructive testing and evaluation is one of the promising inspection methods for characterization of wide
verity of materials due to its merits and applicability to test materials irrespective of their electrical, mechanical,
acoustical and magnetic properties. Among the various infrared non-destructive evaluation modalities such as pulse
based thermography and mono frequency excited modulated lock-in thermography, recently proposed matched filter
based non-periodic infrared thermographic approaches gained their importance due to their superior sub-surface defect
detection in terms of resolution and sensitivity. The present work demonstrates the merits of frequency modulated
thermal wave imaging for identification of concrete in concrete structure. Obtained results shows the matched filter
based post-processing schemes exhibits better depth scanning capabilities compared with the conventional frequency
domain phase approach to detect corrosion in the concrete structures.
